WordNet
n. a control system with a feedback loop that is active [syn: closed-loop system]
Wikipedia
Closed loop may refer to:
- A feedback loop, often found in:
- Closed-loop transfer function, where a closed-loop controller may be used
- Electronic feedback loops in electronic circuits
- PID controller, a commonly used closed-loop controller
- Closed ecological system not relying on matter exchange outside of the system, as opposed to open loop
- Ecological sanitation systems or ecosan, intended to close the nutrient and water cycle
- Pulling water from one area of a reef aquarium and pumping it immediately elsewhere in the tank to create higher flow and minimize dead spots
- Circular economy, one in which materials are consistently reused rather than discharged as waste
- Closed time loop, or predestination paradox, a paradox of time travel that is often used as a convention in science fiction
- Closed curve, a mathematical curve described as a set of continuous parametric equations over a closed interval of real numbers for which the start point equals the end point
Usage examples of "closed loop".
The other end of the closed loop, about a foot from my hand, was taken in the grasp of a soldier.
Simpson (it was said) lay aslumber while being entertained by an endless procession of priceless 1940 radio soap operas, fed to her on a closed loop.
Randy knows that the system is not a closed loop--that it is somewhere connected to the earth's atmosphere--because faint street smells drift in from outside.
This is the inactive position of the chain, lock at collar level, chain terminating with a closed loop, the loop about a foot off the floor, an arrangement permitting a girl to be quickly and conveniently put on the chain and permitting the chain, if no girl is upon it, to be slid in its track without dragging on the steel plates.